Hi there, first off sorry if my English isn't as good, I'm from the Netherlands.

I drive a Civic ep3 type r, k20a2 and last year the aircon was working fine.
This last week it was 36 degrees so i turned the aircon on but it was blowing hot air.
Like any other non air-conditioning expert I went to the Honda garage to fill the aircon and check for leaks.
They filled the aircon and there was no leaks ( aircon coolant wasn't empty, they said it had 375 of coolant Wich should be 420 but they still filled it off. )

When i got home I checked all the fuses under the hood related to the aircon, they were fine.
Then I went to check the relais for the compressor and the fan.
When i turn the ac on the clutch does not engage, but the fan starts.
When i checked the relais slot for the compressor, it didn't give any voltage when the ac was turned on.
i then switched the fan relais with the compressor relais ( because the fan was working, and they're the same I believe ) but the compressor still did nothing, obviously...
I checked the part of the cable to the compressor Wich was reachable untill the last cableshoe underneath the fan, that cable connection came back fine.
After the connector i wasn't able to reach with my meter.
So now, my question is, what is causing the relais to not get power? I've read so many forums but everyone gives a different awnser.
i do not want to replace the whole ac compressor if it fails again due to some other issue.

Any thoughts, ideas or things I can check?
Thanks in advance!